Wire insulation cutting tool



May 2?, 147. c, D, BLL 2,42 049 WIRE INSULATION CUTTING 'TOOL Filed Feb.12, 1945 62$.3ell

INVENTOR.

177' 7' ORA E V 80 Patented May 27,1947

U N l 'i ED STAT E. S PATENT O"F-Fil C E WIRE INSULATION CUTTING TOOLCleo D. Bell, Spokane, Wash.

Application February 12, 1945, Serial No. 577,460

1 Claim. 1

This invention relates to wire cutting and stripthe guide and bladebeing secured on the inner surface of one of the handles oftheplier-type wire cutter, means being provided on the cooperatinghandle of the tool for pressing the Wire being stripped, into engagementwith the blade, so that when the tool is drawn over a length of Wire,the insulation will be longitudinally split and readily removed from thewire.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention consists of certain novel details ofconstruction and combinations of parts hereinafter more fully describedand pointed out in the claim, it being understood that changes may bemade in the construction and arrangement of parts without departing fromthe spirit of the invention as claimed.

Referring to the drawing: Figure 1 is an elevational view of awire-cutting tool constructed in accordance with the invention,illustrating the insulation-stripping device as mounted on the free endsof the handles.

Figure 2 is a plan view thereof.

Figure 3 is a sectional view taken on line 3-4! of Figure 2.

Figure 4 is an enlarged sectional view taken on line 4-4 of Figure 3,illustrating the blade as cutting the insulation between the wires of adual wire conductor.

Referring to the drawing in detail, the referadjacent to the free endthereof, as clearly shown by the drawing. This guide I is disposed at anacute angle with respect to the longitudinal side edges of the handle,so that when a wire is positioned therein, the wire will extend awayfrom the tool, so that the tool may be readily grasped and drawn alongthe wire, to accomplish the purpose of the invention, withoutinterference.

Disposed within the bottom of the guide, and arranged in parallelrelation with the side edges of the guide l, is a blade 8 which isformed with an upper curved cutting edge 9 so constructed that it willcut into the insulation of the wire bein stripped, as the tool is drawnover the wire.

The reference character 10 indicates a pressure ring which is secured tothe inner surface of the opposite handle, the pressure ring being sodisposed-that it will engage a wire held within the guide, and force thewire into the guide, as the handles of the tool are squeezed. Due to theconstruction of the pressure ring, it will be seen that only a smallportion of the ring contacts with the wire being stripped, and which inthe present showing is indicated by the reference character A, to theend that friction between the pressure ring it and the wire will bereduced to the minimum, over an elongated pressure member commonly usedfor accomplishing this result.

The pressure ring It is also disposed at an acute angle with respect tothe handles, and arranged so that the side edges of the pressure ringwill be parallel with the upper edges of the guide I, to insure againstbinding between ence character 5 designates the handles of a plier typewire-cutting tool used by electricians, the blades of the tool beingindicated by the reference character 6.

The wire stripper, forming the essence of the present invention,embodies a guide I which comprises a length of metal curvedlongitudinally, providing a trough-like structure, the guide beingsecured to the inner surface of one of the handles,

the wire and guide, when pressure is directed to the wire in strippingthe insulation therefrom.

When it is desired to strip the insulation from an electric wire, it isonly necessary to position the guide directly under the wire. Pressureis now directed to the wire when grippingthe handles, through thepressure ring I!) which forces the wire against the blade which passesthrough the insulation. As the tool is drawn over the wire, theinsulation will be split longitudinally and may be readily removed.

What is claimed is:

A wire insulation cutting tool, embodying pivotally connected members,an elongated trough-like guide member disposed adjacent to the free endof oneof said pivoted members and being carried by the inner surfacethereof, a

cutting blade disposed within the guide member at a, point intermediatethe ends thereof, and a pressure ring carried by the cooperating pivotedmember, the sides of said pressure ring being parallel to the sides ofthe guide member, presenting a curved friction surface adapted to engagethe wire held within the guideway, whereby said blade is forced into theinsulation of the wire when the pivoted members are forced together,cutting the insulation.

' CLEO D. BELL.

REFERENCES CITED The following references are of record in the file ofthis patent:

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